Development of Nutrient-Rich Media Through Cyanobacterial Amendment and Their Characterization
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ORIGINAL PAPER
Development of Nutrient‑Rich Media Through Cyanobacterial Amendment and Their Characterization Asha Bharti1 · Radha Prasanna1 · Kulandaivelu Velmourougane2 · Arun Kumar3 · Yashbir Singh Shivay4 · Lata Nain1 Received: 4 May 2019 / Accepted: 23 September 2019 © Springer Nature B.V. 2019
Abstract Exogenous addition of growth stimulants or other chemicals to soil-less medium is a common practice for enhancing biomass and productivity, and a promising amendment option can be cyanobacteria, a ubiquitous group of photosynthetic, plant growth promoting and agriculturally beneficial microorganisms, used as biofertilizers in agriculture. The performance of three nitrogen-fixing cyanobacterial cultures- Anabaena torulosa (BF1), Anabaena doliolum (BF4) and Anabaena laxa (RPAN8), through amendment to two media - namely rooting mix (cocopeat, vermiculite and perlite in 3:1:1) and sand contained in Pro-Trays was evaluated at fortnightly intervals up to 30 days. An enhancement, up to 2- to 3-fold in chlorophyll (as an index of photosynthetic biomass) and 30–45% IAA was observed in the extracts of cyanobacterium–amended media, over control; rooting mix was more promising as compared to sand. The addition of cyanobacteria also brought a significant enhancement of 30–40% in the availability of nitrogen and micronutrients–Mn, Cu, Zn and Fe in both media. Phytotoxicity studies with seeds of mustard, radish, maize and wheat, revealed no inhibition, highlighting the promise of these fortified rooting mixes as organic inputs in nursery propagation.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12649-019-00829-0) contains supplementary material, which is available to authorized users. Extended author information available on the last page of the article
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Waste and Biomass Valorization
Graphic Abstract
Keywords Chlorophyll · Cyanobacteria · Indole acetic acid · Nutrients · Rooting mix
Statement of Novelty Novel and valuable information was generated on fortification of soil-less substrates with cyanobacteria for enhancing nutrient availability and improved germination.
Introduction Diminishing availability of fertile land for crops and the increasing profitability of cultivation of commercial crops, have motivated research into the practice of soil-less substrates in horticulture for growing seedlings, plant propagation, and ornamental plant production. Efforts are on to develop effective rooting mixes for vegetatively propagated horticultural and floricultural crops. These substrates provide suitable drainage and aeration required for most crops, particularly for ornamental and flower crops [1, 2]. Soil-less media components, include peat, perlite, sand, bark, grit, coir, rockwool, vermiculite, lignite powder, clay, talc, rice bran, rock phosphate pellet, charcoal, paddy straw compost, wheat bran or a mixture of such materials. These substrates support plants through their several desirable properties such as large porosity, lighter weig
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